1873860978 has 64 divisors (see below), whose sum is σ = 4312788480. Its totient is φ = 536803200.

The previous prime is 1873860977. The next prime is 1873860983. The reversal of 1873860978 is 8790683781.

It is a super-2 number, since 2×1873860978² = 7022709929742232968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (1873860973) 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, 714726 + ... + 717342.

It is an arithmetic number, because the mean of its divisors is an integer number (67387320).

Almost surely, 2^1873860978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1873860978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2156394240).

1873860978 is an abundant number, since it is smaller than the sum of its proper divisors (2438927502).

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

1873860978 is a wasteful number, since it uses less digits than its factorization.

1873860978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3223.

The product of its (nonzero) digits is 4064256, while the sum is 57.

The square root of 1873860978 is about 43288.1158980152. The cubic root of 1873860978 is about 1232.8562914925.

The spelling of 1873860978 in words is "one billion, eight hundred seventy-three million, eight hundred sixty thousand, nine hundred seventy-eight".