97212040 has 32 divisors (see below), whose sum is σ = 222318360. Its totient is φ = 38246400.

The previous prime is 97212029. The next prime is 97212041. The reversal of 97212040 is 4021279.

It can be written as a sum of positive squares in 4 ways, for example, as 39967684 + 57244356 = 6322^2 + 7566^2 .

It is a junction number, because it is equal to n+sod(n) for n = 97211996 and 97212014.

It is not an unprimeable number, because it can be changed into a prime (97212041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17481 + ... + 22360.

Almost surely, 2^97212040 is an apocalyptic number.

It is an amenable number.

97212040 is an abundant number, since it is smaller than the sum of its proper divisors (125106320).

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

97212040 is a wasteful number, since it uses less digits than its factorization.

97212040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39913 (or 39909 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 97212040 is about 9859.6166254069. The cubic root of 97212040 is about 459.8046429436.

The spelling of 97212040 in words is "ninety-seven million, two hundred twelve thousand, forty".