72571040 has 24 divisors (see below), whose sum is σ = 171449460. Its totient is φ = 29028352.

The previous prime is 72571027. The next prime is 72571043. The reversal of 72571040 is 4017527.

It can be written as a sum of positive squares in 2 ways, for example, as 72114064 + 456976 = 8492^2 + 676^2 .

It is not an unprimeable number, because it can be changed into a prime (72571043) 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, 226625 + ... + 226944.

Almost surely, 2^72571040 is an apocalyptic number.

It is an amenable number.

72571040 is an abundant number, since it is smaller than the sum of its proper divisors (98878420).

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

72571040 is a wasteful number, since it uses less digits than its factorization.

72571040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453584 (or 453576 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 72571040 is about 8518.8637740018. The cubic root of 72571040 is about 417.1136948043.

Adding to 72571040 its reverse (4017527), we get a palindrome (76588567).

The spelling of 72571040 in words is "seventy-two million, five hundred seventy-one thousand, forty".