1090638420 has 24 divisors (see below), whose sum is σ = 3053787744. Its totient is φ = 290836896.

The previous prime is 1090638407. The next prime is 1090638433. The reversal of 1090638420 is 248360901.

It is an interprime number because it is at equal distance from previous prime (1090638407) and next prime (1090638433).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9088594 + ... + 9088713.

It is an arithmetic number, because the mean of its divisors is an integer number (127241156).

Almost surely, 2^1090638420 is an apocalyptic number.

1090638420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1090638420 is an abundant number, since it is smaller than the sum of its proper divisors (1963149324).

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

1090638420 is a wasteful number, since it uses less digits than its factorization.

1090638420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18177319 (or 18177317 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 1090638420 is about 33024.8152152287. The cubic root of 1090638420 is about 1029.3433524738.

The spelling of 1090638420 in words is "one billion, ninety million, six hundred thirty-eight thousand, four hundred twenty".