2142355428 has 18 divisors (see below), whose sum is σ = 5415398534. Its totient is φ = 714118464.

The previous prime is 2142355387. The next prime is 2142355429. The reversal of 2142355428 is 8245532412.

It can be written as a sum of positive squares in only one way, i.e., 2127238884 + 15116544 = 46122^2 + 3888^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 59509873 = 2142355428 / (2 + 1 + 4 + 2 + 3 + 5 + 5 + 4 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 2142355392 and 2142355401.

It is not an unprimeable number, because it can be changed into a prime (2142355429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29754901 + ... + 29754972.

Almost surely, 2^2142355428 is an apocalyptic number.

It is an amenable number.

2142355428 is an abundant number, since it is smaller than the sum of its proper divisors (3273043106).

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

2142355428 is a wasteful number, since it uses less digits than its factorization.

2142355428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59509883 (or 59509878 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The square root of 2142355428 is about 46285.5855315670. The cubic root of 2142355428 is about 1289.1313640267.

The spelling of 2142355428 in words is "two billion, one hundred forty-two million, three hundred fifty-five thousand, four hundred twenty-eight".