40278492 has 48 divisors (see below), whose sum is σ = 104781600. Its totient is φ = 13380480.

The previous prime is 40278479. The next prime is 40278493. The reversal of 40278492 is 29487204.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40278493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49384 + ... + 50192.

It is an arithmetic number, because the mean of its divisors is an integer number (2182950).

Almost surely, 2^40278492 is an apocalyptic number.

It is an amenable number.

40278492 is an abundant number, since it is smaller than the sum of its proper divisors (64503108).

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

40278492 is a wasteful number, since it uses less digits than its factorization.

40278492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283 (or 1275 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 40278492 is about 6346.5338571538. The cubic root of 40278492 is about 342.7870454910.

The spelling of 40278492 in words is "forty million, two hundred seventy-eight thousand, four hundred ninety-two".