1340894478 has 32 divisors (see below), whose sum is σ = 3343530240. Its totient is φ = 348284160.

The previous prime is 1340894461. The next prime is 1340894501. The reversal of 1340894478 is 8744980431.

It is a super-2 number, since 2×1340894478² = 3595996002261784968, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1450723 + ... + 1451646.

It is an arithmetic number, because the mean of its divisors is an integer number (104485320).

Almost surely, 2^1340894478 is an apocalyptic number.

1340894478 is an abundant number, since it is smaller than the sum of its proper divisors (2002635762).

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

1340894478 is a wasteful number, since it uses less digits than its factorization.

1340894478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2902392.

The product of its (nonzero) digits is 774144, while the sum is 48.

The square root of 1340894478 is about 36618.2260356779. The cubic root of 1340894478 is about 1102.7190249803.

The spelling of 1340894478 in words is "one billion, three hundred forty million, eight hundred ninety-four thousand, four hundred seventy-eight".