1423574778 has 16 divisors (see below), whose sum is σ = 2924100000. Its totient is φ = 461699856.

The previous prime is 1423574729. The next prime is 1423574819. The reversal of 1423574778 is 8774753241.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3206028 + ... + 3206471.

It is an arithmetic number, because the mean of its divisors is an integer number (182756250).

Almost surely, 2^1423574778 is an apocalyptic number.

1423574778 is an abundant number, since it is smaller than the sum of its proper divisors (1500525222).

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

1423574778 is a wasteful number, since it uses less digits than its factorization.

1423574778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6412541.

The product of its digits is 1317120, while the sum is 48.

The square root of 1423574778 is about 37730.2899273250. The cubic root of 1423574778 is about 1124.9332709063.

It can be divided in two parts, 1423 and 574778, that added together give a triangular number (576201 = T₁₀₇₃).

The spelling of 1423574778 in words is "one billion, four hundred twenty-three million, five hundred seventy-four thousand, seven hundred seventy-eight".