38651240 has 32 divisors (see below), whose sum is σ = 87194880. Its totient is φ = 15419712.

The previous prime is 38651231. The next prime is 38651243. The reversal of 38651240 is 4215683.

It is not an unprimeable number, because it can be changed into a prime (38651243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17477 + ... + 19563.

It is an arithmetic number, because the mean of its divisors is an integer number (2724840).

Almost surely, 2^38651240 is an apocalyptic number.

It is an amenable number.

38651240 is an abundant number, since it is smaller than the sum of its proper divisors (48543640).

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

38651240 is a wasteful number, since it uses less digits than its factorization.

38651240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561 (or 2557 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 38651240 is about 6217.0121441091. The cubic root of 38651240 is about 338.1072451251.

The spelling of 38651240 in words is "thirty-eight million, six hundred fifty-one thousand, two hundred forty".