40897740 has 48 divisors (see below), whose sum is σ = 123324768. Its totient is φ = 10066944.

The previous prime is 40897729. The next prime is 40897757. The reversal of 40897740 is 4779804.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 25437 + ... + 26996.

It is an arithmetic number, because the mean of its divisors is an integer number (2569266).

Almost surely, 2^40897740 is an apocalyptic number.

It is an amenable number.

40897740 is an abundant number, since it is smaller than the sum of its proper divisors (82427028).

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

40897740 is a wasteful number, since it uses less digits than its factorization.

40897740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52458 (or 52456 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 40897740 is about 6395.1340877264. The cubic root of 40897740 is about 344.5348067542.

The spelling of 40897740 in words is "forty million, eight hundred ninety-seven thousand, seven hundred forty".