40747920 has 40 divisors (see below), whose sum is σ = 126319296. Its totient is φ = 10866048.

The previous prime is 40747909. The next prime is 40747921. The reversal of 40747920 is 2974704.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (40747921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84652 + ... + 85131.

Almost surely, 2^40747920 is an apocalyptic number.

40747920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40747920 is an abundant number, since it is smaller than the sum of its proper divisors (85571376).

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

40747920 is a wasteful number, since it uses less digits than its factorization.

40747920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169799 (or 169793 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 40747920 is about 6383.4097471492. The cubic root of 40747920 is about 344.1135824678.

The spelling of 40747920 in words is "forty million, seven hundred forty-seven thousand, nine hundred twenty".