61604235 has 96 divisors (see below), whose sum is σ = 139097088. Its totient is φ = 24456960.

The previous prime is 61604233. The next prime is 61604237. The reversal of 61604235 is 53240616.

61604235 is a `hidden beast` number, since 616 + 0 + 42 + 3 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (61604233) and next prime (61604237).

It is not a de Polignac number, because 61604235 - 2¹ = 61604233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61604199 and 61604208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61604233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 79309 + ... + 80081.

It is an arithmetic number, because the mean of its divisors is an integer number (1448928).

Almost surely, 2^61604235 is an apocalyptic number.

61604235 is an abundant number, since it is smaller than the sum of its proper divisors (77492853).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61604235 is a wasteful number, since it uses less digits than its factorization.

61604235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825 (or 822 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 61604235 is about 7848.8365379845. The cubic root of 61604235 is about 394.9452148555.

The spelling of 61604235 in words is "sixty-one million, six hundred four thousand, two hundred thirty-five".