1978762608 has 160 divisors (see below), whose sum is σ = 5799420480. Its totient is φ = 653930496.

The previous prime is 1978762607. The next prime is 1978762613. The reversal of 1978762608 is 8062678791.

1978762608 is a `hidden beast` number, since 1 + 9 + 7 + 8 + 7 + 626 + 0 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1978762603) 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, 6753310 + ... + 6753602.

It is an arithmetic number, because the mean of its divisors is an integer number (36246378).

Almost surely, 2^1978762608 is an apocalyptic number.

1978762608 is a gapful number since it is divisible by the number (18) 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 1978762608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2899710240).

1978762608 is an abundant number, since it is smaller than the sum of its proper divisors (3820657872).

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

1978762608 is an equidigital number, since it uses as much as digits as its factorization.

1978762608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515 (or 491 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The square root of 1978762608 is about 44483.2845909562. The cubic root of 1978762608 is about 1255.4455982902.

The spelling of 1978762608 in words is "one billion, nine hundred seventy-eight million, seven hundred sixty-two thousand, six hundred eight".