16523940 has 24 divisors (see below), whose sum is σ = 46267200. Its totient is φ = 4406368.

The previous prime is 16523933. The next prime is 16523957. The reversal of 16523940 is 4932561.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 16523898 and 16523907.

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 7 ways as a sum of consecutive naturals, for example, 137640 + ... + 137759.

It is an arithmetic number, because the mean of its divisors is an integer number (1927800).

Almost surely, 2^16523940 is an apocalyptic number.

16523940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16523940 is an abundant number, since it is smaller than the sum of its proper divisors (29743260).

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

16523940 is a wasteful number, since it uses less digits than its factorization.

16523940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275411 (or 275409 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 16523940 is about 4064.9649444983. The cubic root of 16523940 is about 254.7052341773.

The spelling of 16523940 in words is "sixteen million, five hundred twenty-three thousand, nine hundred forty".