1023189400 has 24 divisors (see below), whose sum is σ = 2378915820. Its totient is φ = 409275680.

The previous prime is 1023189371. The next prime is 1023189413. The reversal of 1023189400 is 49813201.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2557774 + ... + 2558173.

Almost surely, 2^1023189400 is an apocalyptic number.

1023189400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023189400 is an abundant number, since it is smaller than the sum of its proper divisors (1355726420).

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

1023189400 is a wasteful number, since it uses less digits than its factorization.

1023189400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5115963 (or 5115954 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1023189400 is about 31987.3318674753. The cubic root of 1023189400 is about 1007.6708082474.

The spelling of 1023189400 in words is "one billion, twenty-three million, one hundred eighty-nine thousand, four hundred".