690038 has 4 divisors (see below), whose sum is σ = 1035060. Its totient is φ = 345018.

The previous prime is 690037. The next prime is 690059. The reversal of 690038 is 830096.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 689989 and 690016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690037) 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 as a sum of consecutive naturals, namely, 172508 + ... + 172511.

It is an arithmetic number, because the mean of its divisors is an integer number (258765).

2⁶⁹⁰⁰³⁸ is an apocalyptic number.

690038 is a deficient number, since it is larger than the sum of its proper divisors (345022).

690038 is a wasteful number, since it uses less digits than its factorization.

690038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345021.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 690038 is about 830.6852592890. The cubic root of 690038 is about 88.3671813639.

The spelling of 690038 in words is "six hundred ninety thousand, thirty-eight".