372721636 has 45 divisors (see below), whose sum is σ = 764810249. Its totient is φ = 158926992.

The previous prime is 372721619. The next prime is 372721681. The reversal of 372721636 is 636127273.

372721636 = 1³ + 2³ + ... + 196³.

The square root of 372721636 is 19306.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 365192100 + 7529536 = 19110^2 + 2744^2 .

It is a junction number, because it is equal to n+sod(n) for n = 372721595 and 372721604.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1891890 + ... + 1892086.

Almost surely, 2^372721636 is an apocalyptic number.

372721636 is the 19306-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 372721636

372721636 is an abundant number, since it is smaller than the sum of its proper divisors (392088613).

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

372721636 is an frugal number, since it uses more digits than its factorization.

372721636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426 (or 206 counting only the distinct ones).

The product of its digits is 63504, while the sum is 37.

The cubic root of 372721636 is about 719.6613865582.

Multiplying 372721636 by its product of digits (63504), we get a square (23669314772544 = 4865112²).

The spelling of 372721636 in words is "three hundred seventy-two million, seven hundred twenty-one thousand, six hundred thirty-six".