1023465690 has 72 divisors (see below), whose sum is σ = 2881492380. Its totient is φ = 251926272.

The previous prime is 1023465689. The next prime is 1023465691. The reversal of 1023465690 is 965643201.

It is a happy number.

1023465690 is a `hidden beast` number, since 102 + 3 + 465 + 6 + 90 = 666.

It is an interprime number because it is at equal distance from previous prime (1023465689) and next prime (1023465691).

It can be written as a sum of positive squares in 6 ways, for example, as 5919489 + 1017546201 = 2433^2 + 31899^2 .

It is a super-2 number, since 2×1023465690² = 2094964037214352200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1023465691) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 18435 + ... + 48854.

Almost surely, 2^1023465690 is an apocalyptic number.

1023465690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1023465690 is an abundant number, since it is smaller than the sum of its proper divisors (1858026690).

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

1023465690 is a wasteful number, since it uses less digits than its factorization.

1023465690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67328 (or 67312 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 1023465690 is about 31991.6503169186. The cubic root of 1023465690 is about 1007.7614999323.

The spelling of 1023465690 in words is "one billion, twenty-three million, four hundred sixty-five thousand, six hundred ninety".