72878737 has 8 divisors (see below), whose sum is σ = 79189760. Its totient is φ = 66815280.

The previous prime is 72878723. The next prime is 72878749. The reversal of 72878737 is 73787827.

72878737 = T₁₇₃ + T₁₇₄ + ... + T₇₆₁.

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

It is a cyclic number.

It is not a de Polignac number, because 72878737 - 2¹¹ = 72876689 is a prime.

It is a super-2 number, since 2×72878737² = 10622620613430338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72878797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61278 + ... + 62455.

It is an arithmetic number, because the mean of its divisors is an integer number (9898720).

Almost surely, 2^72878737 is an apocalyptic number.

It is an amenable number.

72878737 is a deficient number, since it is larger than the sum of its proper divisors (6311023).

72878737 is a wasteful number, since it uses less digits than its factorization.

72878737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123783.

The product of its digits is 921984, while the sum is 49.

The square root of 72878737 is about 8536.9044155361. The cubic root of 72878737 is about 417.7023762184.

The spelling of 72878737 in words is "seventy-two million, eight hundred seventy-eight thousand, seven hundred thirty-seven".