1423579640 has 32 divisors (see below), whose sum is σ = 3660634080. Its totient is φ = 488084352.

The previous prime is 1423579627. The next prime is 1423579649. The reversal of 1423579640 is 469753241.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423579649) 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, 2541827 + ... + 2542386.

It is an arithmetic number, because the mean of its divisors is an integer number (114394815).

Almost surely, 2^1423579640 is an apocalyptic number.

1423579640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1423579640 is an abundant number, since it is smaller than the sum of its proper divisors (2237054440).

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

1423579640 is a wasteful number, since it uses less digits than its factorization.

1423579640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5084231 (or 5084227 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 1423579640 is about 37730.3543582617. The cubic root of 1423579640 is about 1124.9345515835.

The spelling of 1423579640 in words is "one billion, four hundred twenty-three million, five hundred seventy-nine thousand, six hundred forty".