72437130 has 24 divisors (see below), whose sum is σ = 188336772. Its totient is φ = 19316544.

The previous prime is 72437107. The next prime is 72437147. The reversal of 72437130 is 3173427.

It can be written as a sum of positive squares in 2 ways, for example, as 72437121 + 9 = 8511^2 + 3^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72437094 and 72437103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 402339 + ... + 402518.

Almost surely, 2^72437130 is an apocalyptic number.

72437130 is an abundant number, since it is smaller than the sum of its proper divisors (115899642).

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

72437130 is a wasteful number, since it uses less digits than its factorization.

72437130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804870 (or 804867 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 72437130 is about 8511.0005287275. Note that the first 3 decimals coincide. The cubic root of 72437130 is about 416.8569804381.

The spelling of 72437130 in words is "seventy-two million, four hundred thirty-seven thousand, one hundred thirty".