670938840 has 192 divisors, whose sum is σ = 2561963040. Its totient is φ = 150128640.

The previous prime is 670938833. The next prime is 670938869. The reversal of 670938840 is 48839076.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44964 + ... + 57996.

Almost surely, 2^670938840 is an apocalyptic number.

670938840 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 670938840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1280981520).

670938840 is an abundant number, since it is smaller than the sum of its proper divisors (1891024200).

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

670938840 is a wasteful number, since it uses less digits than its factorization.

670938840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13074 (or 13067 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 670938840 is about 25902.4871392691. The cubic root of 670938840 is about 875.4425364190.

The spelling of 670938840 in words is "six hundred seventy million, nine hundred thirty-eight thousand, eight hundred forty".