38221820040 has 32 divisors (see below), whose sum is σ = 114665460480. Its totient is φ = 10192485312.

The previous prime is 38221820009. The next prime is 38221820071. The reversal of 38221820040 is 4002812283.

It is an interprime number because it is at equal distance from previous prime (38221820009) and next prime (38221820071).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159257464 + ... + 159257703.

It is an arithmetic number, because the mean of its divisors is an integer number (3583295640).

Almost surely, 2^38221820040 is an apocalyptic number.

38221820040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38221820040 is an abundant number, since it is smaller than the sum of its proper divisors (76443640440).

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

38221820040 is a wasteful number, since it uses less digits than its factorization.

38221820040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318515181 (or 318515177 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The spelling of 38221820040 in words is "thirty-eight billion, two hundred twenty-one million, eight hundred twenty thousand, forty".