690145044 has 24 divisors (see below), whose sum is σ = 1613330208. Its totient is φ = 229620960.

The previous prime is 690145031. The next prime is 690145067. The reversal of 690145044 is 440541096.

It is a junction number, because it is equal to n+sod(n) for n = 690144996 and 690145014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46662 + ... + 59645.

It is an arithmetic number, because the mean of its divisors is an integer number (67222092).

Almost surely, 2^690145044 is an apocalyptic number.

It is an amenable number.

690145044 is an abundant number, since it is smaller than the sum of its proper divisors (923185164).

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

690145044 is a wasteful number, since it uses less digits than its factorization.

690145044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106855 (or 106853 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 690145044 is about 26270.6117934090. The cubic root of 690145044 is about 883.7175052655.

The spelling of 690145044 in words is "six hundred ninety million, one hundred forty-five thousand, forty-four".