1553420840 has 32 divisors (see below), whose sum is σ = 3499217280. Its totient is φ = 620653632.

The previous prime is 1553420783. The next prime is 1553420887. The reversal of 1553420840 is 480243551.

It is a super-2 number, since 2×1553420840² = 4826232612292611200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1553420797 and 1553420806.

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, 13589 + ... + 57371.

It is an arithmetic number, because the mean of its divisors is an integer number (109350540).

Almost surely, 2^1553420840 is an apocalyptic number.

1553420840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1553420840 is an abundant number, since it is smaller than the sum of its proper divisors (1945796440).

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

1553420840 is a wasteful number, since it uses less digits than its factorization.

1553420840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44681 (or 44677 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 1553420840 is about 39413.4601373693. The cubic root of 1553420840 is about 1158.1452822177.

The spelling of 1553420840 in words is "one billion, five hundred fifty-three million, four hundred twenty thousand, eight hundred forty".