1040550640 has 40 divisors (see below), whose sum is σ = 2425835808. Its totient is φ = 415092480.

The previous prime is 1040550631. The next prime is 1040550647. The reversal of 1040550640 is 460550401.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040550647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12405 + ... + 47275.

Almost surely, 2^1040550640 is an apocalyptic number.

1040550640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1040550640 is an abundant number, since it is smaller than the sum of its proper divisors (1385285168).

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

1040550640 is a wasteful number, since it uses less digits than its factorization.

1040550640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35257 (or 35251 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1040550640 is about 32257.5671742306. The cubic root of 1040550640 is about 1013.3381819174.

The spelling of 1040550640 in words is "one billion, forty million, five hundred fifty thousand, six hundred forty".