40178240 has 112 divisors (see below), whose sum is σ = 102705408. Its totient is φ = 14936064.

The previous prime is 40178239. The next prime is 40178269. The reversal of 40178240 is 4287104.

It is a super-2 number, since 2×40178240² = 3228581938995200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 390029 + ... + 390131.

Almost surely, 2^40178240 is an apocalyptic number.

40178240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40178240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51352704).

40178240 is an abundant number, since it is smaller than the sum of its proper divisors (62527168).

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

40178240 is a wasteful number, since it uses less digits than its factorization.

40178240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 186 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 40178240 is about 6338.6307669717. The cubic root of 40178240 is about 342.5024135373.

The spelling of 40178240 in words is "forty million, one hundred seventy-eight thousand, two hundred forty".