38724816 has 80 divisors (see below), whose sum is σ = 108604160. Its totient is φ = 11819520.

The previous prime is 38724781. The next prime is 38724841. The reversal of 38724816 is 61842783.

It is a super-2 number, since 2×38724816² = 2999222748467712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142761 + ... + 143031.

It is an arithmetic number, because the mean of its divisors is an integer number (1357552).

Almost surely, 2^38724816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38724816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54302080).

38724816 is an abundant number, since it is smaller than the sum of its proper divisors (69879344).

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

38724816 is a wasteful number, since it uses less digits than its factorization.

38724816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524 (or 518 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 38724816 is about 6222.9266426658. The cubic root of 38724816 is about 338.3216479958.

The spelling of 38724816 in words is "thirty-eight million, seven hundred twenty-four thousand, eight hundred sixteen".