40015456 has 48 divisors (see below), whose sum is σ = 86852304. Its totient is φ = 18031104.

The previous prime is 40015441. The next prime is 40015483. The reversal of 40015456 is 65451004.

It is a self number, because there is not a number n which added to its sum of digits gives 40015456.

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, 16770 + ... + 19006.

It is an arithmetic number, because the mean of its divisors is an integer number (1809423).

Almost surely, 2^40015456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40015456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43426152).

40015456 is an abundant number, since it is smaller than the sum of its proper divisors (46836848).

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

40015456 is a wasteful number, since it uses less digits than its factorization.

40015456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2303 (or 2295 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 40015456 is about 6325.7771064115. Note that the first 3 decimals coincide. The cubic root of 40015456 is about 342.0392326434.

The spelling of 40015456 in words is "forty million, fifteen thousand, four hundred fifty-six".