694545984 has 84 divisors (see below), whose sum is σ = 2171791440. Its totient is φ = 210466560.

The previous prime is 694545983. The next prime is 694545991. The reversal of 694545984 is 489545496.

694545984 is a `hidden beast` number, since 6 + 9 + 4 + 545 + 98 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 694545984.

It is not an unprimeable number, because it can be changed into a prime (694545983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48474 + ... + 61145.

It is an arithmetic number, because the mean of its divisors is an integer number (25854660).

Almost surely, 2^694545984 is an apocalyptic number.

694545984 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

694545984 is an abundant number, since it is smaller than the sum of its proper divisors (1477245456).

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

694545984 is a wasteful number, since it uses less digits than its factorization.

694545984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109648 (or 109635 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The square root of 694545984 is about 26354.2403419260. The cubic root of 694545984 is about 885.5919663003.

Adding to 694545984 its product of digits (6220800), we get a square (700766784 = 26472²).

The spelling of 694545984 in words is "six hundred ninety-four million, five hundred forty-five thousand, nine hundred eighty-four".