1263631404 has 108 divisors (see below), whose sum is σ = 3620484504. Its totient is φ = 341978112.

The previous prime is 1263631381. The next prime is 1263631451. The reversal of 1263631404 is 4041363621.

It is a super-2 number, since 2×1263631404² = 3193528650350022432, which contains 22 as substring.

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, 209292 + ... + 215244.

Almost surely, 2^1263631404 is an apocalyptic number.

1263631404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1263631404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1810242252).

1263631404 is an abundant number, since it is smaller than the sum of its proper divisors (2356853100).

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

1263631404 is a wasteful number, since it uses less digits than its factorization.

1263631404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6012 (or 5984 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 1263631404 is about 35547.5935050462. The cubic root of 1263631404 is about 1081.1189260784.

The spelling of 1263631404 in words is "one billion, two hundred sixty-three million, six hundred thirty-one thousand, four hundred four".