60990640 has 40 divisors (see below), whose sum is σ = 146383488. Its totient is φ = 23608320.

The previous prime is 60990637. The next prime is 60990647. The reversal of 60990640 is 4609906.

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

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 60990596 and 60990605.

It is not an unprimeable number, because it can be changed into a prime (60990647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9817 + ... + 14776.

Almost surely, 2^60990640 is an apocalyptic number.

It is an amenable number.

60990640 is an abundant number, since it is smaller than the sum of its proper divisors (85392848).

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

60990640 is a wasteful number, since it uses less digits than its factorization.

60990640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24637 (or 24631 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 60990640 is about 7809.6504403206. The cubic root of 60990640 is about 393.6295830652.

The spelling of 60990640 in words is "sixty million, nine hundred ninety thousand, six hundred forty".