72023130 has 48 divisors (see below), whose sum is σ = 187878600. Its totient is φ = 19142784.

The previous prime is 72023111. The next prime is 72023177. The reversal of 72023130 is 3132027.

72023130 = T₄₆₀ + T₄₆₁ + ... + T₈₀₈.

It can be written as a sum of positive squares in 4 ways, for example, as 58384881 + 13638249 = 7641^2 + 3693^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30264 + ... + 32556.

Almost surely, 2^72023130 is an apocalyptic number.

72023130 is an abundant number, since it is smaller than the sum of its proper divisors (115855470).

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

72023130 is a wasteful number, since it uses less digits than its factorization.

72023130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2655 (or 2652 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 72023130 is about 8486.6442131151. The cubic root of 72023130 is about 416.0613083027.

Adding to 72023130 its reverse (3132027), we get a palindrome (75155157).

The spelling of 72023130 in words is "seventy-two million, twenty-three thousand, one hundred thirty".