1690248438 has 64 divisors (see below), whose sum is σ = 3792035520. Its totient is φ = 558061056.

The previous prime is 1690248431. The next prime is 1690248487. The reversal of 1690248438 is 8348420961.

It is a happy number.

1690248438 is a `hidden beast` number, since 169 + 0 + 2 + 484 + 3 + 8 = 666.

It is a super-2 number, since 2×1690248438² = 5713879564322879688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1690248393 and 1690248402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690248431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5015406 + ... + 5015742.

It is an arithmetic number, because the mean of its divisors is an integer number (59250555).

Almost surely, 2^1690248438 is an apocalyptic number.

1690248438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1690248438 is an abundant number, since it is smaller than the sum of its proper divisors (2101787082).

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

1690248438 is a wasteful number, since it uses less digits than its factorization.

1690248438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958 (or 952 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 1690248438 is about 41112.6311247529. The cubic root of 1690248438 is about 1191.1967899989.

The spelling of 1690248438 in words is "one billion, six hundred ninety million, two hundred forty-eight thousand, four hundred thirty-eight".