1040697840 has 320 divisors, whose sum is σ = 4205730816. Its totient is φ = 206585856.

The previous prime is 1040697809. The next prime is 1040697871. The reversal of 1040697840 is 487960401.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1040697809) and next prime (1040697871).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 369879 + ... + 372681.

Almost surely, 2^1040697840 is an apocalyptic number.

1040697840 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 1040697840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2102865408).

1040697840 is an abundant number, since it is smaller than the sum of its proper divisors (3165032976).

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

1040697840 is a wasteful number, since it uses less digits than its factorization.

1040697840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2856 (or 2850 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 1040697840 is about 32259.8487287216. The cubic root of 1040697840 is about 1013.3859631406.

The spelling of 1040697840 in words is "one billion, forty million, six hundred ninety-seven thousand, eight hundred forty".