706401640 has 64 divisors (see below), whose sum is σ = 1853568000. Its totient is φ = 242190144.

The previous prime is 706401637. The next prime is 706401653. The reversal of 706401640 is 46104607.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 706401599 and 706401608.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12024 + ... + 39463.

It is an arithmetic number, because the mean of its divisors is an integer number (28962000).

Almost surely, 2^706401640 is an apocalyptic number.

706401640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

706401640 is an abundant number, since it is smaller than the sum of its proper divisors (1147166360).

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

706401640 is a wasteful number, since it uses less digits than its factorization.

706401640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51519 (or 51501 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 706401640 is about 26578.2173969587. The cubic root of 706401640 is about 890.6024789052.

The spelling of 706401640 in words is "seven hundred six million, four hundred one thousand, six hundred forty".