1023459990 has 32 divisors (see below), whose sum is σ = 2807205120. Its totient is φ = 233933664.

The previous prime is 1023459989. The next prime is 1023460019. The reversal of 1023459990 is 999543201.

It is a super-2 number, since 2×1023459990² = 2094940702261600200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2436600 + ... + 2437019.

It is an arithmetic number, because the mean of its divisors is an integer number (87725160).

Almost surely, 2^1023459990 is an apocalyptic number.

1023459990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1023459990 is an abundant number, since it is smaller than the sum of its proper divisors (1783745130).

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

1023459990 is a wasteful number, since it uses less digits than its factorization.

1023459990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4873636.

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 1023459990 is about 31991.5612310497. The cubic root of 1023459990 is about 1007.7596290826.

The spelling of 1023459990 in words is "one billion, twenty-three million, four hundred fifty-nine thousand, nine hundred ninety".