1802428578 has 128 divisors (see below), whose sum is σ = 4333824000. Its totient is φ = 553573440.

The previous prime is 1802428547. The next prime is 1802428643. The reversal of 1802428578 is 8758242081.

It is a happy number.

It is a super-2 number, since 2×1802428578² = 6497497557582204168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7940101 + ... + 7940327.

It is an arithmetic number, because the mean of its divisors is an integer number (33858000).

Almost surely, 2^1802428578 is an apocalyptic number.

1802428578 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1802428578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2166912000).

1802428578 is an abundant number, since it is smaller than the sum of its proper divisors (2531395422).

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

1802428578 is a wasteful number, since it uses less digits than its factorization.

1802428578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 45.

The square root of 1802428578 is about 42455.0182899501. The cubic root of 1802428578 is about 1216.9872311083.

The spelling of 1802428578 in words is "one billion, eight hundred two million, four hundred twenty-eight thousand, five hundred seventy-eight".