706598640 has 400 divisors, whose sum is σ = 2800106496. Its totient is φ = 163468800.

The previous prime is 706598639. The next prime is 706598647. The reversal of 706598640 is 46895607.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (706598647) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1639225 + ... + 1639655.

Almost surely, 2^706598640 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 706598640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1400053248).

706598640 is an abundant number, since it is smaller than the sum of its proper divisors (2093507856).

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

706598640 is a wasteful number, since it uses less digits than its factorization.

706598640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490 (or 475 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 706598640 is about 26581.9231809890. The cubic root of 706598640 is about 890.6852610749.

The spelling of 706598640 in words is "seven hundred six million, five hundred ninety-eight thousand, six hundred forty".