38405961 has 16 divisors (see below), whose sum is σ = 62070720. Its totient is φ = 23276160.

The previous prime is 38405953. The next prime is 38405981. The reversal of 38405961 is 16950483.

It is not a de Polignac number, because 38405961 - 2³ = 38405953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38405911) 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, 64360 + ... + 64953.

It is an arithmetic number, because the mean of its divisors is an integer number (3879420).

Almost surely, 2^38405961 is an apocalyptic number.

It is an amenable number.

38405961 is a deficient number, since it is larger than the sum of its proper divisors (23664759).

38405961 is a wasteful number, since it uses less digits than its factorization.

38405961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129333 (or 129327 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 38405961 is about 6197.2543113866. The cubic root of 38405961 is about 337.3905225165.

It can be divided in two parts, 3840 and 5961, that added together give a square (9801 = 99²).

The spelling of 38405961 in words is "thirty-eight million, four hundred five thousand, nine hundred sixty-one".