40028864 has 14 divisors (see below), whose sum is σ = 79432404. Its totient is φ = 20014400.

The previous prime is 40028861. The next prime is 40028867. The reversal of 40028864 is 46882004.

It is an interprime number because it is at equal distance from previous prime (40028861) and next prime (40028867).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 40028864.

It is not an unprimeable number, because it can be changed into a prime (40028861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312662 + ... + 312789.

Almost surely, 2^40028864 is an apocalyptic number.

It is an amenable number.

40028864 is a deficient number, since it is larger than the sum of its proper divisors (39403540).

40028864 is an equidigital number, since it uses as much as digits as its factorization.

40028864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625463 (or 625453 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 40028864 is about 6326.8368083901. The cubic root of 40028864 is about 342.0774307996.

The spelling of 40028864 in words is "forty million, twenty-eight thousand, eight hundred sixty-four".