672691320 has 384 divisors, whose sum is σ = 2635776000. Its totient is φ = 145566720.

The previous prime is 672691291. The next prime is 672691321. The reversal of 672691320 is 23196276.

It is a super-2 number, since 2×672691320² = 905027224006684800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672691321) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6171426 + ... + 6171534.

It is an arithmetic number, because the mean of its divisors is an integer number (6864000).

Almost surely, 2^672691320 is an apocalyptic number.

672691320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 672691320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1317888000).

672691320 is an abundant number, since it is smaller than the sum of its proper divisors (1963084680).

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

672691320 is a wasteful number, since it uses less digits than its factorization.

672691320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 672691320 is about 25936.2934900113. The cubic root of 672691320 is about 876.2040870583.

The spelling of 672691320 in words is "six hundred seventy-two million, six hundred ninety-one thousand, three hundred twenty".