72620646 has 60 divisors (see below), whose sum is σ = 171858156. Its totient is φ = 20456520.

The previous prime is 72620629. The next prime is 72620731. The reversal of 72620646 is 64602627.

It is a congruent number.

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 29 ways as a sum of consecutive naturals, for example, 1022791 + ... + 1022861.

Almost surely, 2^72620646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72620646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85929078).

72620646 is an abundant number, since it is smaller than the sum of its proper divisors (99237510).

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

72620646 is an frugal number, since it uses more digits than its factorization.

72620646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 72620646 is about 8521.7748151427. The cubic root of 72620646 is about 417.2087126388.

The spelling of 72620646 in words is "seventy-two million, six hundred twenty thousand, six hundred forty-six".