1019878431 has 16 divisors (see below), whose sum is σ = 1597572480. Its totient is φ = 570561120.

The previous prime is 1019878411. The next prime is 1019878451. The reversal of 1019878431 is 1348789101.

It is an interprime number because it is at equal distance from previous prime (1019878411) and next prime (1019878451).

It is not a de Polignac number, because 1019878431 - 2⁶ = 1019878367 is a prime.

It is a super-2 number, since 2×1019878431² = 2080304028038043522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1019878411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1188241 + ... + 1189098.

It is an arithmetic number, because the mean of its divisors is an integer number (99848280).

Almost surely, 2^1019878431 is an apocalyptic number.

1019878431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1019878431 is a deficient number, since it is larger than the sum of its proper divisors (577694049).

1019878431 is a wasteful number, since it uses less digits than its factorization.

1019878431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2377366.

The product of its (nonzero) digits is 48384, while the sum is 42.

The square root of 1019878431 is about 31935.5355521087. The cubic root of 1019878431 is about 1006.5827164300.

The spelling of 1019878431 in words is "one billion, nineteen million, eight hundred seventy-eight thousand, four hundred thirty-one".