1098907540 has 24 divisors (see below), whose sum is σ = 2443453992. Its totient is φ = 413706240.

The previous prime is 1098907493. The next prime is 1098907549. The reversal of 1098907540 is 457098901.

It can be written as a sum of positive squares in 4 ways, for example, as 82955664 + 1015951876 = 9108^2 + 31874^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098907549) 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, 1615701 + ... + 1616380.

It is an arithmetic number, because the mean of its divisors is an integer number (101810583).

Almost surely, 2^1098907540 is an apocalyptic number.

1098907540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1098907540 is an abundant number, since it is smaller than the sum of its proper divisors (1344546452).

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

1098907540 is a wasteful number, since it uses less digits than its factorization.

1098907540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232107 (or 3232105 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 1098907540 is about 33149.7743582064. The cubic root of 1098907540 is about 1031.9382674950.

The spelling of 1098907540 in words is "one billion, ninety-eight million, nine hundred seven thousand, five hundred forty".