1040834640 has 160 divisors (see below), whose sum is σ = 3391140096. Its totient is φ = 263577600.

The previous prime is 1040834629. The next prime is 1040834671. The reversal of 1040834640 is 464380401.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1040834598 and 1040834607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 866040 + ... + 867240.

Almost surely, 2^1040834640 is an apocalyptic number.

1040834640 is a gapful number since it is divisible by the number (10) 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 1040834640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1695570048).

1040834640 is an abundant number, since it is smaller than the sum of its proper divisors (2350305456).

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

1040834640 is a wasteful number, since it uses less digits than its factorization.

1040834640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397 (or 1391 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 1040834640 is about 32261.9689417742. The cubic root of 1040834640 is about 1013.4303644774.

The spelling of 1040834640 in words is "one billion, forty million, eight hundred thirty-four thousand, six hundred forty".