13903640 has 16 divisors (see below), whose sum is σ = 31283280. Its totient is φ = 5561440.

The previous prime is 13903621. The next prime is 13903651. The reversal of 13903640 is 4630931.

It is a super-2 number, since 2×13903640² = 386622410499200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173756 + ... + 173835.

It is an arithmetic number, because the mean of its divisors is an integer number (1955205).

Almost surely, 2^13903640 is an apocalyptic number.

13903640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13903640 is an abundant number, since it is smaller than the sum of its proper divisors (17379640).

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

13903640 is a wasteful number, since it uses less digits than its factorization.

13903640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347602 (or 347598 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 13903640 is about 3728.7585065273. The cubic root of 13903640 is about 240.4599974096.

The spelling of 13903640 in words is "thirteen million, nine hundred three thousand, six hundred forty".