38897720 has 16 divisors (see below), whose sum is σ = 87519960. Its totient is φ = 15559072.

The previous prime is 38897713. The next prime is 38897737. The reversal of 38897720 is 2779883.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 486182 + ... + 486261.

Almost surely, 2^38897720 is an apocalyptic number.

It is an amenable number.

38897720 is an abundant number, since it is smaller than the sum of its proper divisors (48622240).

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

38897720 is a wasteful number, since it uses less digits than its factorization.

38897720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972454 (or 972450 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 38897720 is about 6236.8036685469. The cubic root of 38897720 is about 338.8244291187.

It can be divided in two parts, 388977 and 20, that multiplied together give a triangular number (7779540 = T₃₉₄₄).

The spelling of 38897720 in words is "thirty-eight million, eight hundred ninety-seven thousand, seven hundred twenty".