1027391020 has 48 divisors (see below), whose sum is σ = 2185793568. Its totient is φ = 405596160.

The previous prime is 1027391003. The next prime is 1027391021. The reversal of 1027391020 is 201937201.

It is a super-3 number, since 3×1027391020³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1027391021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1266415 + ... + 1267225.

It is an arithmetic number, because the mean of its divisors is an integer number (45537366).

Almost surely, 2^1027391020 is an apocalyptic number.

1027391020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1027391020 is an abundant number, since it is smaller than the sum of its proper divisors (1158402548).

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

1027391020 is a wasteful number, since it uses less digits than its factorization.

1027391020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570 (or 1568 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 1027391020 is about 32052.9408947135. The cubic root of 1027391020 is about 1009.0482227383.

The spelling of 1027391020 in words is "one billion, twenty-seven million, three hundred ninety-one thousand, twenty".