78040830 has 48 divisors (see below), whose sum is σ = 217881360. Its totient is φ = 17837568.

The previous prime is 78040801. The next prime is 78040871. The reversal of 78040830 is 3804087.

It is a super-2 number, since 2×78040830² = 12180742294177800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25075 + ... + 28014.

It is an arithmetic number, because the mean of its divisors is an integer number (4539195).

Almost surely, 2^78040830 is an apocalyptic number.

78040830 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78040830 is an abundant number, since it is smaller than the sum of its proper divisors (139840530).

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

78040830 is a wasteful number, since it uses less digits than its factorization.

78040830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53113 (or 53106 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 78040830 is about 8834.0721074712. The cubic root of 78040830 is about 427.3404075814.

The spelling of 78040830 in words is "seventy-eight million, forty thousand, eight hundred thirty".