40197870 has 40 divisors (see below), whose sum is σ = 108089784. Its totient is φ = 10719216.

The previous prime is 40197811. The next prime is 40197881. The reversal of 40197870 is 7879104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24004 + ... + 25623.

Almost surely, 2^40197870 is an apocalyptic number.

40197870 is an abundant number, since it is smaller than the sum of its proper divisors (67891914).

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

40197870 is a wasteful number, since it uses less digits than its factorization.

40197870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49646 (or 49637 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 40197870 is about 6340.1790195546. The cubic root of 40197870 is about 342.5581835903.

The spelling of 40197870 in words is "forty million, one hundred ninety-seven thousand, eight hundred seventy".