40188486 has 16 divisors (see below), whose sum is σ = 86559984. Its totient is φ = 12365664.

The previous prime is 40188443. The next prime is 40188497. The reversal of 40188486 is 68488104.

It is a super-2 number, since 2×40188486² = 3230228813944392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257541 + ... + 257696.

It is an arithmetic number, because the mean of its divisors is an integer number (5409999).

Almost surely, 2^40188486 is an apocalyptic number.

40188486 is an abundant number, since it is smaller than the sum of its proper divisors (46371498).

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

40188486 is a wasteful number, since it uses less digits than its factorization.

40188486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515255.

The product of its (nonzero) digits is 49152, while the sum is 39.

The square root of 40188486 is about 6339.4389341644. The cubic root of 40188486 is about 342.5315253273.

The spelling of 40188486 in words is "forty million, one hundred eighty-eight thousand, four hundred eighty-six".