38158992 has 80 divisors (see below), whose sum is σ = 115320000. Its totient is φ = 12047616.

The previous prime is 38158969. The next prime is 38158997. The reversal of 38158992 is 29985183.

It is a happy number.

It is a super-2 number, since 2×38158992² = 2912217340912128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38158997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5884 + ... + 10532.

It is an arithmetic number, because the mean of its divisors is an integer number (1441500).

Almost surely, 2^38158992 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 38158992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57660000).

38158992 is an abundant number, since it is smaller than the sum of its proper divisors (77161008).

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

38158992 is a wasteful number, since it uses less digits than its factorization.

38158992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4685 (or 4673 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 38158992 is about 6177.2964960410. The cubic root of 38158992 is about 336.6657717629.

The spelling of 38158992 in words is "thirty-eight million, one hundred fifty-eight thousand, nine hundred ninety-two".