1290379640440 has 64 divisors (see below), whose sum is σ = 3168395688960. Its totient is φ = 469065966720.

The previous prime is 1290379640411. The next prime is 1290379640471. The reversal of 1290379640440 is 440469730921.

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, 762369 + ... + 1778191.

It is an arithmetic number, because the mean of its divisors is an integer number (49506182640).

Almost surely, 2^{1290379640440} is an apocalyptic number.

1290379640440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1290379640440 is an abundant number, since it is smaller than the sum of its proper divisors (1878016048520).

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

1290379640440 is a wasteful number, since it uses less digits than its factorization.

1290379640440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018732 (or 1018728 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 49.

The spelling of 1290379640440 in words is "one trillion, two hundred ninety billion, three hundred seventy-nine million, six hundred forty thousand, four hundred forty".