15430450440 has 32 divisors (see below), whose sum is σ = 46291351680. Its totient is φ = 4114786752.

The previous prime is 15430450439. The next prime is 15430450457. The reversal of 15430450440 is 4405403451.

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 = 15430450398 and 15430450407.

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, 64293424 + ... + 64293663.

It is an arithmetic number, because the mean of its divisors is an integer number (1446604740).

Almost surely, 2^15430450440 is an apocalyptic number.

15430450440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15430450440 is an abundant number, since it is smaller than the sum of its proper divisors (30860901240).

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

15430450440 is a wasteful number, since it uses less digits than its factorization.

15430450440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128587101 (or 128587097 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 15430450440 its reverse (4405403451), we get a palindrome (19835853891).

The spelling of 15430450440 in words is "fifteen billion, four hundred thirty million, four hundred fifty thousand, four hundred forty".