38973840 has 40 divisors (see below), whose sum is σ = 120819648. Its totient is φ = 10392960.

The previous prime is 38973829. The next prime is 38973853. The reversal of 38973840 is 4837983.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 38973792 and 38973801.

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, 80956 + ... + 81435.

Almost surely, 2^38973840 is an apocalyptic number.

38973840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38973840 is an abundant number, since it is smaller than the sum of its proper divisors (81845808).

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

38973840 is a wasteful number, since it uses less digits than its factorization.

38973840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162407 (or 162401 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 38973840 is about 6242.9031708012. The cubic root of 38973840 is about 339.0453033319.

The spelling of 38973840 in words is "thirty-eight million, nine hundred seventy-three thousand, eight hundred forty".