690015402 has 16 divisors (see below), whose sum is σ = 1533367680. Its totient is φ = 230005116.

The previous prime is 690015401. The next prime is 690015407. The reversal of 690015402 is 204510096.

It is a super-2 number, since 2×690015402² = 952242509994443208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (690015401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6388978 + ... + 6389085.

It is an arithmetic number, because the mean of its divisors is an integer number (95835480).

Almost surely, 2^690015402 is an apocalyptic number.

690015402 is an abundant number, since it is smaller than the sum of its proper divisors (843352278).

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

690015402 is a wasteful number, since it uses less digits than its factorization.

690015402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12778074 (or 12778068 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 690015402 is about 26268.1442435510. The cubic root of 690015402 is about 883.6621671013.

Adding to 690015402 its reverse (204510096), we get a palindrome (894525498).

The spelling of 690015402 in words is "six hundred ninety million, fifteen thousand, four hundred two".