1958061990 has 64 divisors (see below), whose sum is σ = 5061906432. Its totient is φ = 483331200.

The previous prime is 1958061983. The next prime is 1958062009. The reversal of 1958061990 is 991608591.

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, 24381 + ... + 67160.

It is an arithmetic number, because the mean of its divisors is an integer number (79092288).

Almost surely, 2^1958061990 is an apocalyptic number.

1958061990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1958061990 is an abundant number, since it is smaller than the sum of its proper divisors (3103844442).

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

1958061990 is a wasteful number, since it uses less digits than its factorization.

1958061990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91605.

The product of its (nonzero) digits is 174960, while the sum is 48.

The square root of 1958061990 is about 44249.9942372878. The cubic root of 1958061990 is about 1251.0523383519.

The spelling of 1958061990 in words is "one billion, nine hundred fifty-eight million, sixty-one thousand, nine hundred ninety".