1520620538 has 8 divisors (see below), whose sum is σ = 2282398560. Its totient is φ = 759821020.

The previous prime is 1520620529. The next prime is 1520620601. The reversal of 1520620538 is 8350260251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240728 + ... + 246963.

It is an arithmetic number, because the mean of its divisors is an integer number (285299820).

Almost surely, 2^1520620538 is an apocalyptic number.

1520620538 is a deficient number, since it is larger than the sum of its proper divisors (761778022).

1520620538 is a wasteful number, since it uses less digits than its factorization.

1520620538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489252.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 1520620538 is about 38995.1347991003. The cubic root of 1520620538 is about 1149.9358598128.

Adding to 1520620538 its reverse (8350260251), we get a palindrome (9870880789).

The spelling of 1520620538 in words is "one billion, five hundred twenty million, six hundred twenty thousand, five hundred thirty-eight".