40172078 has 8 divisors (see below), whose sum is σ = 60314880. Its totient is φ = 20067120.

The previous prime is 40172057. The next prime is 40172089. The reversal of 40172078 is 87027104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×40172078² = 3227591701676168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40172078.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6638 + ... + 11153.

It is an arithmetic number, because the mean of its divisors is an integer number (7539360).

Almost surely, 2^40172078 is an apocalyptic number.

40172078 is a deficient number, since it is larger than the sum of its proper divisors (20142802).

40172078 is a wasteful number, since it uses less digits than its factorization.

40172078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18922.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 40172078 is about 6338.1446812139. The cubic root of 40172078 is about 342.4849031654.

The spelling of 40172078 in words is "forty million, one hundred seventy-two thousand, seventy-eight".