1538529420 has 24 divisors (see below), whose sum is σ = 4307882544. Its totient is φ = 410274496.

The previous prime is 1538529413. The next prime is 1538529463. The reversal of 1538529420 is 249258351.

It is a super-3 number, since 3×1538529420³ (a number of 29 digits) contains 333 as substring.

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, 12821019 + ... + 12821138.

It is an arithmetic number, because the mean of its divisors is an integer number (179495106).

Almost surely, 2^1538529420 is an apocalyptic number.

1538529420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1538529420 is an abundant number, since it is smaller than the sum of its proper divisors (2769353124).

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

1538529420 is a wasteful number, since it uses less digits than its factorization.

1538529420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25642169 (or 25642167 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 1538529420 is about 39224.0923413149. The cubic root of 1538529420 is about 1154.4326517755.

The spelling of 1538529420 in words is "one billion, five hundred thirty-eight million, five hundred twenty-nine thousand, four hundred twenty".