38221956 has 36 divisors (see below), whose sum is σ = 100197552. Its totient is φ = 12740328.

The previous prime is 38221921. The next prime is 38221979. The reversal of 38221956 is 65912283.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a self number, because there is not a number n which added to its sum of digits gives 38221956.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18690 + ... + 20633.

Almost surely, 2^38221956 is an apocalyptic number.

38221956 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

38221956 is an abundant number, since it is smaller than the sum of its proper divisors (61975596).

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

38221956 is a wasteful number, since it uses less digits than its factorization.

38221956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39342 (or 39328 counting only the distinct ones).

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

The square root of 38221956 is about 6182.3907996826. The cubic root of 38221956 is about 336.8508410752.

It can be divided in two parts, 3822 and 1956, that added together give a triangular number (5778 = T₁₀₇).

The spelling of 38221956 in words is "thirty-eight million, two hundred twenty-one thousand, nine hundred fifty-six".