72870558 has 8 divisors (see below), whose sum is σ = 145741128. Its totient is φ = 24290184.

The previous prime is 72870557. The next prime is 72870559. The reversal of 72870558 is 85507827.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72870557) and next prime (72870559).

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

72870558 is an admirable number.

It is a super-3 number, since 3×72870558³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72870557) 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, 6072541 + ... + 6072552.

It is an arithmetic number, because the mean of its divisors is an integer number (18217641).

Almost surely, 2^72870558 is an apocalyptic number.

72870558 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

72870558 is a wasteful number, since it uses less digits than its factorization.

72870558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12145098.

The product of its (nonzero) digits is 156800, while the sum is 42.

The square root of 72870558 is about 8536.4253642845. The cubic root of 72870558 is about 417.6867497331.

The spelling of 72870558 in words is "seventy-two million, eight hundred seventy thousand, five hundred fifty-eight".