38723436 has 18 divisors (see below), whose sum is σ = 97884332. Its totient is φ = 12907800.

The previous prime is 38723431. The next prime is 38723437. The reversal of 38723436 is 63432783.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1075651 = 38723436 / (3 + 8 + 7 + 2 + 3 + 4 + 3 + 6).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 38723436.

It is not an unprimeable number, because it can be changed into a prime (38723431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 537790 + ... + 537861.

Almost surely, 2^38723436 is an apocalyptic number.

38723436 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

38723436 is an abundant number, since it is smaller than the sum of its proper divisors (59160896).

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

38723436 is a wasteful number, since it uses less digits than its factorization.

38723436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075661 (or 1075656 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 38723436 is about 6222.8157613736. The cubic root of 38723436 is about 338.3176291308.

The spelling of 38723436 in words is "thirty-eight million, seven hundred twenty-three thousand, four hundred thirty-six".