1553405340 has 48 divisors (see below), whose sum is σ = 4355291808. Its totient is φ = 413693184.

The previous prime is 1553405323. The next prime is 1553405353. The reversal of 1553405340 is 435043551.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1553405298 and 1553405307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29634 + ... + 63126.

It is an arithmetic number, because the mean of its divisors is an integer number (90735246).

Almost surely, 2^1553405340 is an apocalyptic number.

1553405340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1553405340 is an abundant number, since it is smaller than the sum of its proper divisors (2801886468).

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

1553405340 is a wasteful number, since it uses less digits than its factorization.

1553405340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34278 (or 34276 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 1553405340 is about 39413.2635035466. The cubic root of 1553405340 is about 1158.1414302220.

Adding to 1553405340 its reverse (435043551), we get a palindrome (1988448891).

The spelling of 1553405340 in words is "one billion, five hundred fifty-three million, four hundred five thousand, three hundred forty".