38709707220 has 120 divisors (see below), whose sum is σ = 121502997000. Its totient is φ = 10316706048.

The previous prime is 38709707189. The next prime is 38709707221. The reversal of 38709707220 is 2270790783.

It can be written as a sum of positive squares in 4 ways, for example, as 6787452996 + 31922254224 = 82386^2 + 178668^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38709707221) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3346006 + ... + 3357554.

It is an arithmetic number, because the mean of its divisors is an integer number (1012524975).

Almost surely, 2^38709707220 is an apocalyptic number.

38709707220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38709707220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60751498500).

38709707220 is an abundant number, since it is smaller than the sum of its proper divisors (82793289780).

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

38709707220 is a wasteful number, since it uses less digits than its factorization.

38709707220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13639 (or 13628 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The spelling of 38709707220 in words is "thirty-eight billion, seven hundred nine million, seven hundred seven thousand, two hundred twenty".