38621970 has 96 divisors (see below), whose sum is σ = 105431040. Its totient is φ = 9797760.

The previous prime is 38621953. The next prime is 38621983. The reversal of 38621970 is 7912683.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 304047 + ... + 304173.

It is an arithmetic number, because the mean of its divisors is an integer number (1098240).

Almost surely, 2^38621970 is an apocalyptic number.

38621970 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 38621970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52715520).

38621970 is an abundant number, since it is smaller than the sum of its proper divisors (66809070).

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

38621970 is a wasteful number, since it uses less digits than its factorization.

38621970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 38621970 is about 6214.6576735972. The cubic root of 38621970 is about 338.0218757360.

It can be divided in two parts, 3862 and 1970, that added together give a cube (5832 = 18³).

The spelling of 38621970 in words is "thirty-eight million, six hundred twenty-one thousand, nine hundred seventy".