38744420 has 192 divisors, whose sum is σ = 108380160. Its totient is φ = 11404800.

The previous prime is 38744413. The next prime is 38744437. The reversal of 38744420 is 2444783.

It is a super-2 number, since 2×38744420² = 3002260162272800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1249805 + ... + 1249835.

It is an arithmetic number, because the mean of its divisors is an integer number (564480).

Almost surely, 2^38744420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38744420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54190080).

38744420 is an abundant number, since it is smaller than the sum of its proper divisors (69635740).

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

38744420 is a wasteful number, since it uses less digits than its factorization.

38744420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 32.

The square root of 38744420 is about 6224.5015864726. The cubic root of 38744420 is about 338.3787288669.

The spelling of 38744420 in words is "thirty-eight million, seven hundred forty-four thousand, four hundred twenty".