40749972 has 12 divisors (see below), whose sum is σ = 95083296. Its totient is φ = 13583320.

The previous prime is 40749937. The next prime is 40749979. The reversal of 40749972 is 27994704.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40749979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1697904 + ... + 1697927.

It is an arithmetic number, because the mean of its divisors is an integer number (7923608).

Almost surely, 2^40749972 is an apocalyptic number.

It is an amenable number.

40749972 is an abundant number, since it is smaller than the sum of its proper divisors (54333324).

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

40749972 is a wasteful number, since it uses less digits than its factorization.

40749972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3395838 (or 3395836 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 40749972 is about 6383.5704742722. The cubic root of 40749972 is about 344.1193587072.

The spelling of 40749972 in words is "forty million, seven hundred forty-nine thousand, nine hundred seventy-two".