6723920 has 40 divisors (see below), whose sum is σ = 17867904. Its totient is φ = 2305152.

The previous prime is 6723917. The next prime is 6723949. The reversal of 6723920 is 293276.

6723920 = T₂₈₉ + T₂₉₀ + ... + T₄₀₀.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×6723920² = 90422200332800, 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 7 ways as a sum of consecutive naturals, for example, 5444 + ... + 6563.

Almost surely, 2^6723920 is an apocalyptic number.

It is an amenable number.

6723920 is an abundant number, since it is smaller than the sum of its proper divisors (11143984).

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

6723920 is a wasteful number, since it uses less digits than its factorization.

6723920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12027 (or 12021 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 6723920 is about 2593.0522555475. The cubic root of 6723920 is about 188.7444452556.

The spelling of 6723920 in words is "six million, seven hundred twenty-three thousand, nine hundred twenty".