72821435 has 4 divisors (see below), whose sum is σ = 87385728. Its totient is φ = 58257144.

The previous prime is 72821423. The next prime is 72821443. The reversal of 72821435 is 53412827.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72821435 is a prime.

It is a super-2 number, since 2×72821435² = 10605922790918450, which contains 22 as substring.

It is a Duffinian number.

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, 7282139 + ... + 7282148.

It is an arithmetic number, because the mean of its divisors is an integer number (21846432).

Almost surely, 2^72821435 is an apocalyptic number.

72821435 is a deficient number, since it is larger than the sum of its proper divisors (14564293).

72821435 is a wasteful number, since it uses less digits than its factorization.

72821435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14564292.

The product of its digits is 13440, while the sum is 32.

The square root of 72821435 is about 8533.5476210073. The cubic root of 72821435 is about 417.5928725944.

The spelling of 72821435 in words is "seventy-two million, eight hundred twenty-one thousand, four hundred thirty-five".