72878347 has 4 divisors (see below), whose sum is σ = 74073136. Its totient is φ = 71683560.

The previous prime is 72878327. The next prime is 72878353. The reversal of 72878347 is 74387827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74387827 = 5653 ⋅13159.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72878347 is a prime.

It is a super-2 number, since 2×72878347² = 10622506922904818, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72878297 and 72878306.

It is not an unprimeable number, because it can be changed into a prime (72878327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 597303 + ... + 597424.

It is an arithmetic number, because the mean of its divisors is an integer number (18518284).

Almost surely, 2^72878347 is an apocalyptic number.

72878347 is a deficient number, since it is larger than the sum of its proper divisors (1194789).

72878347 is a wasteful number, since it uses less digits than its factorization.

72878347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1194788.

The product of its digits is 526848, while the sum is 46.

The square root of 72878347 is about 8536.8815735021. The cubic root of 72878347 is about 417.7016311258.

The spelling of 72878347 in words is "seventy-two million, eight hundred seventy-eight thousand, three hundred forty-seven".