45628381 has 6 divisors (see below), whose sum is σ = 46118270. Its totient is φ = 45139896.

The previous prime is 45628379. The next prime is 45628403. The reversal of 45628381 is 18382654.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 41860900 + 3767481 = 6470^2 + 1941^2 .

It is not a de Polignac number, because 45628381 - 2¹ = 45628379 is a prime.

It is a super-2 number, since 2×45628381² = 4163898305362322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45628381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45628301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70200 + ... + 70846.

Almost surely, 2^45628381 is an apocalyptic number.

It is an amenable number.

45628381 is a deficient number, since it is larger than the sum of its proper divisors (489889).

45628381 is an frugal number, since it uses more digits than its factorization.

45628381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403 (or 756 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 45628381 is about 6754.8783112651. The cubic root of 45628381 is about 357.3373012256.

The spelling of 45628381 in words is "forty-five million, six hundred twenty-eight thousand, three hundred eighty-one".