670545400 has 144 divisors (see below), whose sum is σ = 1849200840. Its totient is φ = 225388800.

The previous prime is 670545373. The next prime is 670545431. The reversal of 670545400 is 4545076.

It is a happy number.

It is a super-2 number, since 2×670545400² = 899262266922320000, 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 35 ways as a sum of consecutive naturals, for example, 518755 + ... + 520045.

Almost surely, 2^670545400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670545400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (924600420).

670545400 is an abundant number, since it is smaller than the sum of its proper divisors (1178655440).

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

670545400 is a wasteful number, since it uses less digits than its factorization.

670545400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374 (or 1358 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 670545400 is about 25894.8913880711. The cubic root of 670545400 is about 875.2713824883.

The spelling of 670545400 in words is "six hundred seventy million, five hundred forty-five thousand, four hundred".