690220312 has 8 divisors (see below), whose sum is σ = 1294163100. Its totient is φ = 345110152.

The previous prime is 690220309. The next prime is 690220313. The reversal of 690220312 is 213022096.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690220313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43138762 + ... + 43138777.

Almost surely, 2^690220312 is an apocalyptic number.

It is an amenable number.

690220312 is a deficient number, since it is larger than the sum of its proper divisors (603942788).

690220312 is a wasteful number, since it uses less digits than its factorization.

690220312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86277545 (or 86277541 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 690220312 is about 26272.0443056874. The cubic root of 690220312 is about 883.7496305083.

The spelling of 690220312 in words is "six hundred ninety million, two hundred twenty thousand, three hundred twelve".