690749136 has 120 divisors (see below), whose sum is σ = 2410185024. Its totient is φ = 179412480.

The previous prime is 690749107. The next prime is 690749149. The reversal of 690749136 is 631947096.

It is a junction number, because it is equal to n+sod(n) for n = 690749091 and 690749100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20061 + ... + 42236.

Almost surely, 2^690749136 is an apocalyptic number.

690749136 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

690749136 is an abundant number, since it is smaller than the sum of its proper divisors (1719435888).

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

690749136 is a wasteful number, since it uses less digits than its factorization.

690749136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62329 (or 62320 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 690749136 is about 26282.1067648695. The cubic root of 690749136 is about 883.9752728149.

It can be divided in two parts, 69074 and 9136, that added together give a triangular number (78210 = T₃₉₅).

The spelling of 690749136 in words is "six hundred ninety million, seven hundred forty-nine thousand, one hundred thirty-six".