1253890390 has 8 divisors (see below), whose sum is σ = 2257002720. Its totient is φ = 501556152.

The previous prime is 1253890367. The next prime is 1253890409. The reversal of 1253890390 is 930983521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1253890390² = 3144482220268704200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62694510 + ... + 62694529.

It is an arithmetic number, because the mean of its divisors is an integer number (282125340).

Almost surely, 2^1253890390 is an apocalyptic number.

1253890390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1253890390 is a deficient number, since it is larger than the sum of its proper divisors (1003112330).

1253890390 is a wasteful number, since it uses less digits than its factorization.

1253890390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125389046.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 1253890390 is about 35410.3147401996. The cubic root of 1253890390 is about 1078.3337331229. Note that the first 3 decimals are identical.

The spelling of 1253890390 in words is "one billion, two hundred fifty-three million, eight hundred ninety thousand, three hundred ninety".