1455557890 has 32 divisors (see below), whose sum is σ = 2784712320. Its totient is φ = 546217344.

The previous prime is 1455557881. The next prime is 1455557891. The reversal of 1455557890 is 987555541.

It is a super-2 number, since 2×1455557890² = 4237297542282504200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1455557891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17619 + ... + 56758.

It is an arithmetic number, because the mean of its divisors is an integer number (87022260).

Almost surely, 2^1455557890 is an apocalyptic number.

1455557890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1455557890 is a deficient number, since it is larger than the sum of its proper divisors (1329154430).

1455557890 is a wasteful number, since it uses less digits than its factorization.

1455557890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74506.

The product of its (nonzero) digits is 1260000, while the sum is 49.

The square root of 1455557890 is about 38151.7744017234. The cubic root of 1455557890 is about 1133.2954911432.

The spelling of 1455557890 in words is "one billion, four hundred fifty-five million, five hundred fifty-seven thousand, eight hundred ninety".