1351890870 has 64 divisors (see below), whose sum is σ = 3567476736. Its totient is φ = 325140480.

The previous prime is 1351890823. The next prime is 1351890901. The reversal of 1351890870 is 780981531.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25782 + ... + 58038.

It is an arithmetic number, because the mean of its divisors is an integer number (55741824).

Almost surely, 2^1351890870 is an apocalyptic number.

1351890870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1351890870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1783738368).

1351890870 is an abundant number, since it is smaller than the sum of its proper divisors (2215585866).

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

1351890870 is a wasteful number, since it uses less digits than its factorization.

1351890870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32405.

The product of its (nonzero) digits is 60480, while the sum is 42.

The square root of 1351890870 is about 36768.0686193877. The cubic root of 1351890870 is about 1105.7252106929.

The spelling of 1351890870 in words is "one billion, three hundred fifty-one million, eight hundred ninety thousand, eight hundred seventy".