1023553404 has 108 divisors (see below), whose sum is σ = 2699606728. Its totient is φ = 326894400.

The previous prime is 1023553387. The next prime is 1023553423. The reversal of 1023553404 is 4043553201.

1023553404 is a `hidden beast` number, since 102 + 3 + 553 + 4 + 0 + 4 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4850859 + ... + 4851069.

Almost surely, 2^1023553404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1023553404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1349803364).

1023553404 is an abundant number, since it is smaller than the sum of its proper divisors (1676053324).

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

1023553404 is a wasteful number, since it uses less digits than its factorization.

1023553404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 1023553404 is about 31993.0211765004. The cubic root of 1023553404 is about 1007.7902884782.

The spelling of 1023553404 in words is "one billion, twenty-three million, five hundred fifty-three thousand, four hundred four".