1820725458 has 16 divisors (see below), whose sum is σ = 3730267296. Its totient is φ = 592105760.

The previous prime is 1820725457. The next prime is 1820725477. The reversal of 1820725458 is 8545270281.

It is not an unprimeable number, because it can be changed into a prime (1820725453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3700416 + ... + 3700907.

It is an arithmetic number, because the mean of its divisors is an integer number (233141706).

Almost surely, 2^1820725458 is an apocalyptic number.

1820725458 is an abundant number, since it is smaller than the sum of its proper divisors (1909541838).

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

1820725458 is a wasteful number, since it uses less digits than its factorization.

1820725458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7401369.

The product of its (nonzero) digits is 179200, while the sum is 42.

The square root of 1820725458 is about 42669.9596671944. The cubic root of 1820725458 is about 1221.0913503255.

The spelling of 1820725458 in words is "one billion, eight hundred twenty million, seven hundred twenty-five thousand, four hundred fifty-eight".