38497728 has 56 divisors (see below), whose sum is σ = 104249728. Its totient is φ = 12531456.

The previous prime is 38497721. The next prime is 38497733. The reversal of 38497728 is 82779483.

It is a super-2 number, since 2×38497728² = 2964150122323968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38497721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5925 + ... + 10587.

Almost surely, 2^38497728 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 38497728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52124864).

38497728 is an abundant number, since it is smaller than the sum of its proper divisors (65752000).

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

38497728 is a wasteful number, since it uses less digits than its factorization.

38497728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4721 (or 4711 counting only the distinct ones).

The product of its digits is 677376, while the sum is 48.

The square root of 38497728 is about 6204.6537373169. The cubic root of 38497728 is about 337.6590284841.

The spelling of 38497728 in words is "thirty-eight million, four hundred ninety-seven thousand, seven hundred twenty-eight".