38645040 has 80 divisors (see below), whose sum is σ = 136919808. Its totient is φ = 8832768.

The previous prime is 38645039. The next prime is 38645041. The reversal of 38645040 is 4054683.

It is an interprime number because it is at equal distance from previous prime (38645039) and next prime (38645041).

It is a tau number, because it is divible by the number of its divisors (80).

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

It is a junction number, because it is equal to n+sod(n) for n = 38644989 and 38645007.

It is not an unprimeable number, because it can be changed into a prime (38645041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9822 + ... + 13181.

Almost surely, 2^38645040 is an apocalyptic number.

38645040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38645040 is an abundant number, since it is smaller than the sum of its proper divisors (98274768).

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

38645040 is a wasteful number, since it uses less digits than its factorization.

38645040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23026 (or 23020 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 38645040 is about 6216.5134923042. The cubic root of 38645040 is about 338.0891656964.

The spelling of 38645040 in words is "thirty-eight million, six hundred forty-five thousand, forty".