78382479 has 8 divisors (see below), whose sum is σ = 119440000. Its totient is φ = 44789976.

The previous prime is 78382453. The next prime is 78382487. The reversal of 78382479 is 97428387.

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

It is not a de Polignac number, because 78382479 - 2¹⁹ = 77858191 is a prime.

It is a super-2 number, since 2×78382479² = 12287626028370882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78382879) 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, 1866229 + ... + 1866270.

It is an arithmetic number, because the mean of its divisors is an integer number (14930000).

Almost surely, 2^78382479 is an apocalyptic number.

78382479 is a deficient number, since it is larger than the sum of its proper divisors (41057521).

78382479 is a wasteful number, since it uses less digits than its factorization.

78382479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3732509.

The product of its digits is 677376, while the sum is 48.

The square root of 78382479 is about 8853.3879955642. The cubic root of 78382479 is about 427.9631067713.

The spelling of 78382479 in words is "seventy-eight million, three hundred eighty-two thousand, four hundred seventy-nine".