1023491378 has 48 divisors (see below), whose sum is σ = 1919163456. Its totient is φ = 400795200.

The previous prime is 1023491363. The next prime is 1023491383. The reversal of 1023491378 is 8731943201.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 236825 + ... + 241107.

It is an arithmetic number, because the mean of its divisors is an integer number (39982572).

Almost surely, 2^1023491378 is an apocalyptic number.

1023491378 is a deficient number, since it is larger than the sum of its proper divisors (895672078).

1023491378 is a wasteful number, since it uses less digits than its factorization.

1023491378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4419 (or 4406 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 1023491378 is about 31992.0517941566. The cubic root of 1023491378 is about 1007.7699311417.

The spelling of 1023491378 in words is "one billion, twenty-three million, four hundred ninety-one thousand, three hundred seventy-eight".