16723740 has 48 divisors (see below), whose sum is σ = 51085440. Its totient is φ = 4054080.

The previous prime is 16723739. The next prime is 16723813. The reversal of 16723740 is 4732761.

16723740 = 446² + 447² + ... + 517².

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 = 16723698 and 16723707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12010 + ... + 13329.

It is an arithmetic number, because the mean of its divisors is an integer number (1064280).

Almost surely, 2^16723740 is an apocalyptic number.

16723740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16723740 is an abundant number, since it is smaller than the sum of its proper divisors (34361700).

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

16723740 is a wasteful number, since it uses less digits than its factorization.

16723740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25362 (or 25360 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 16723740 is about 4089.4669579298. The cubic root of 16723740 is about 255.7277175007.

The spelling of 16723740 in words is "sixteen million, seven hundred twenty-three thousand, seven hundred forty".