15485640 has 64 divisors (see below), whose sum is σ = 49196160. Its totient is φ = 3886080.

The previous prime is 15485621. The next prime is 15485651. The reversal of 15485640 is 4658451.

15485640 = T₃₃₉ + T₃₄₀ + ... + T₅₀₈.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1756 + ... + 5835.

It is an arithmetic number, because the mean of its divisors is an integer number (768690).

Almost surely, 2^15485640 is an apocalyptic number.

15485640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15485640 is an abundant number, since it is smaller than the sum of its proper divisors (33710520).

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

15485640 is a wasteful number, since it uses less digits than its factorization.

15485640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7622 (or 7618 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 15485640 is about 3935.1797925889. The cubic root of 15485640 is about 249.2545259499.

The spelling of 15485640 in words is "fifteen million, four hundred eighty-five thousand, six hundred forty".