670942480 has 40 divisors (see below), whose sum is σ = 1679939352. Its totient is φ = 247732224.

The previous prime is 670942469. The next prime is 670942487. The reversal of 670942480 is 84249076.

It can be written as a sum of positive squares in 4 ways, for example, as 10863616 + 660078864 = 3296^2 + 25692^2 .

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

It is a super-2 number, since 2×670942480² = 900327622937100800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (670942487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321529 + ... + 323608.

Almost surely, 2^670942480 is an apocalyptic number.

It is an amenable number.

670942480 is an abundant number, since it is smaller than the sum of its proper divisors (1008996872).

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

670942480 is a wasteful number, since it uses less digits than its factorization.

670942480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645163 (or 645157 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 670942480 is about 25902.5574026967. The cubic root of 670942480 is about 875.4441195762. Note that the first 3 decimals are identical.

The spelling of 670942480 in words is "six hundred seventy million, nine hundred forty-two thousand, four hundred eighty".