72270990 has 96 divisors (see below), whose sum is σ = 210633696. Its totient is φ = 17038080.

The previous prime is 72270967. The next prime is 72271021. The reversal of 72270990 is 9907227.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35644 + ... + 37616.

It is an arithmetic number, because the mean of its divisors is an integer number (2194101).

Almost surely, 2^72270990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72270990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105316848).

72270990 is an abundant number, since it is smaller than the sum of its proper divisors (138362706).

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

72270990 is a wasteful number, since it uses less digits than its factorization.

72270990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034 (or 2031 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 72270990 is about 8501.2346162190. The cubic root of 72270990 is about 416.5380388736.

The spelling of 72270990 in words is "seventy-two million, two hundred seventy thousand, nine hundred ninety".