15640485 has 16 divisors (see below), whose sum is σ = 28599936. Its totient is φ = 7149888.

The previous prime is 15640481. The next prime is 15640517. The reversal of 15640485 is 58404651.

It is not a de Polignac number, because 15640485 - 2² = 15640481 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15640481) 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, 74374 + ... + 74583.

It is an arithmetic number, because the mean of its divisors is an integer number (1787496).

Almost surely, 2^15640485 is an apocalyptic number.

15640485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15640485 is a deficient number, since it is larger than the sum of its proper divisors (12959451).

15640485 is a wasteful number, since it uses less digits than its factorization.

15640485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148972.

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

The square root of 15640485 is about 3954.8053049423. The cubic root of 15640485 is about 250.0825593994.

The spelling of 15640485 in words is "fifteen million, six hundred forty thousand, four hundred eighty-five".