694977408 has 160 divisors (see below), whose sum is σ = 2190458160. Its totient is φ = 217976832.

The previous prime is 694977403. The next prime is 694977427. The reversal of 694977408 is 804779496.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (694977403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 174285 + ... + 178227.

Almost surely, 2^694977408 is an apocalyptic number.

694977408 is a gapful number since it is divisible by the number (68) 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 694977408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1095229080).

694977408 is an abundant number, since it is smaller than the sum of its proper divisors (1495480752).

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

694977408 is a wasteful number, since it uses less digits than its factorization.

694977408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3986 (or 3965 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The square root of 694977408 is about 26362.4241677430. The cubic root of 694977408 is about 885.7752930377.

The spelling of 694977408 in words is "six hundred ninety-four million, nine hundred seventy-seven thousand, four hundred eight".