1958427840 has 56 divisors (see below), whose sum is σ = 6218011440. Its totient is φ = 522247168.

The previous prime is 1958427811. The next prime is 1958427847. The reversal of 1958427840 is 487248591.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1958427840.

It is not an unprimeable number, because it can be changed into a prime (1958427847) 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, 1019055 + ... + 1020974.

Almost surely, 2^1958427840 is an apocalyptic number.

1958427840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1958427840 is an abundant number, since it is smaller than the sum of its proper divisors (4259583600).

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

1958427840 is a wasteful number, since it uses less digits than its factorization.

1958427840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040049 (or 2040039 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The square root of 1958427840 is about 44254.1279430518. The cubic root of 1958427840 is about 1251.1302502528.

The spelling of 1958427840 in words is "one billion, nine hundred fifty-eight million, four hundred twenty-seven thousand, eight hundred forty".