38400761 has 6 divisors (see below), whose sum is σ = 44670330. Its totient is φ = 32914896.

The previous prime is 38400751. The next prime is 38400811. The reversal of 38400761 is 16700483.

It can be written as a sum of positive squares in only one way, i.e., 25755625 + 12645136 = 5075^2 + 3556^2 .

It is a de Polignac number, because none of the positive numbers 2^k-38400761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38400751) 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, 391796 + ... + 391893.

It is an arithmetic number, because the mean of its divisors is an integer number (7445055).

Almost surely, 2^38400761 is an apocalyptic number.

It is an amenable number.

38400761 is a deficient number, since it is larger than the sum of its proper divisors (6269569).

38400761 is an equidigital number, since it uses as much as digits as its factorization.

38400761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783703 (or 783696 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 38400761 is about 6196.8347565511. The cubic root of 38400761 is about 337.3752947597.

The spelling of 38400761 in words is "thirty-eight million, four hundred thousand, seven hundred sixty-one".