1290462978 has 64 divisors (see below), whose sum is σ = 3177234432. Its totient is φ = 341288640.

The previous prime is 1290462977. The next prime is 1290463003. The reversal of 1290462978 is 8792640921.

It is not an unprimeable number, because it can be changed into a prime (1290462977) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8400 + ... + 51492.

It is an arithmetic number, because the mean of its divisors is an integer number (49644288).

Almost surely, 2^1290462978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1290462978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1588617216).

1290462978 is an abundant number, since it is smaller than the sum of its proper divisors (1886771454).

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

1290462978 is a wasteful number, since it uses less digits than its factorization.

1290462978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43159.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 1290462978 is about 35923.0146006707. The cubic root of 1290462978 is about 1088.7174483517.

The spelling of 1290462978 in words is "one billion, two hundred ninety million, four hundred sixty-two thousand, nine hundred seventy-eight".