670988400 has 60 divisors (see below), whose sum is σ = 2149403352. Its totient is φ = 178929920.

The previous prime is 670988393. The next prime is 670988431. The reversal of 670988400 is 4889076.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-4 number, since 4×670988400⁴ (a number of 36 digits) contains 4444 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 278379 + ... + 280778.

Almost surely, 2^670988400 is an apocalyptic number.

670988400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

670988400 is an abundant number, since it is smaller than the sum of its proper divisors (1478414952).

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

670988400 is a wasteful number, since it uses less digits than its factorization.

670988400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559178 (or 559167 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 670988400 is about 25903.4437864929. The cubic root of 670988400 is about 875.4640912221.

The spelling of 670988400 in words is "six hundred seventy million, nine hundred eighty-eight thousand, four hundred".