72307026 has 64 divisors (see below), whose sum is σ = 179625600. Its totient is φ = 21369600.

The previous prime is 72307019. The next prime is 72307033. The reversal of 72307026 is 62070327.

It is an interprime number because it is at equal distance from previous prime (72307019) and next prime (72307033).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22870 + ... + 25838.

It is an arithmetic number, because the mean of its divisors is an integer number (2806650).

Almost surely, 2^72307026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72307026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89812800).

72307026 is an abundant number, since it is smaller than the sum of its proper divisors (107318574).

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

72307026 is a wasteful number, since it uses less digits than its factorization.

72307026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3032 (or 3026 counting only the distinct ones).

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

The square root of 72307026 is about 8503.3538089392. The cubic root of 72307026 is about 416.6072592280.

The spelling of 72307026 in words is "seventy-two million, three hundred seven thousand, twenty-six".