690694290 has 320 divisors, whose sum is σ = 2239332480. Its totient is φ = 150543360.

The previous prime is 690694261. The next prime is 690694331. The reversal of 690694290 is 92496096.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 7760566 + ... + 7760654.

It is an arithmetic number, because the mean of its divisors is an integer number (6997914).

Almost surely, 2^690694290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690694290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1119666240).

690694290 is an abundant number, since it is smaller than the sum of its proper divisors (1548638190).

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

690694290 is a wasteful number, since it uses less digits than its factorization.

690694290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 690694290 is about 26281.0633346522. The cubic root of 690694290 is about 883.9518760955.

The spelling of 690694290 in words is "six hundred ninety million, six hundred ninety-four thousand, two hundred ninety".