40157870 has 8 divisors (see below), whose sum is σ = 72284184. Its totient is φ = 16063144.

The previous prime is 40157869. The next prime is 40157891. The reversal of 40157870 is 7875104.

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

It is a super-2 number, since 2×40157870² = 3225309045873800, 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 3 ways as a sum of consecutive naturals, for example, 2007884 + ... + 2007903.

It is an arithmetic number, because the mean of its divisors is an integer number (9035523).

Almost surely, 2^40157870 is an apocalyptic number.

40157870 is a deficient number, since it is larger than the sum of its proper divisors (32126314).

40157870 is a wasteful number, since it uses less digits than its factorization.

40157870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4015794.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 40157870 is about 6337.0237493637. The cubic root of 40157870 is about 342.4445218895. Note that the first 3 decimals are identical.

The spelling of 40157870 in words is "forty million, one hundred fifty-seven thousand, eight hundred seventy".