78030357 has 16 divisors (see below), whose sum is σ = 111674880. Its totient is φ = 48287232.

The previous prime is 78030353. The next prime is 78030361. The reversal of 78030357 is 75303087.

It is an interprime number because it is at equal distance from previous prime (78030353) and next prime (78030361).

It is not a de Polignac number, because 78030357 - 2² = 78030353 is a prime.

It is a super-2 number, since 2×78030357² = 12177473227094898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78030353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6757 + ... + 14202.

It is an arithmetic number, because the mean of its divisors is an integer number (6979680).

Almost surely, 2^78030357 is an apocalyptic number.

It is an amenable number.

78030357 is a deficient number, since it is larger than the sum of its proper divisors (33644523).

78030357 is a wasteful number, since it uses less digits than its factorization.

78030357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21052.

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 78030357 is about 8833.4793258376. The cubic root of 78030357 is about 427.3212905102.

It can be divided in two parts, 78030 and 357, that added together give a palindrome (78387).

The spelling of 78030357 in words is "seventy-eight million, thirty thousand, three hundred fifty-seven".