38691432 has 96 divisors (see below), whose sum is σ = 117106080. Its totient is φ = 11897280.

The previous prime is 38691427. The next prime is 38691449. The reversal of 38691432 is 23419683.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24507 + ... + 26037.

It is an arithmetic number, because the mean of its divisors is an integer number (1219855).

Almost surely, 2^38691432 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 38691432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58553040).

38691432 is an abundant number, since it is smaller than the sum of its proper divisors (78414648).

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

38691432 is a wasteful number, since it uses less digits than its factorization.

38691432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565 (or 1549 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 38691432 is about 6220.2437251285. The cubic root of 38691432 is about 338.2243996141.

The spelling of 38691432 in words is "thirty-eight million, six hundred ninety-one thousand, four hundred thirty-two".