78302442 has 32 divisors (see below), whose sum is σ = 173031552. Its totient is φ = 23496704.

The previous prime is 78302437. The next prime is 78302443. The reversal of 78302442 is 24420387.

It is a super-2 number, since 2×78302442² = 12262544846326728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78302443) 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, 14343 + ... + 19034.

It is an arithmetic number, because the mean of its divisors is an integer number (5407236).

Almost surely, 2^78302442 is an apocalyptic number.

78302442 is an abundant number, since it is smaller than the sum of its proper divisors (94729110).

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

78302442 is a wasteful number, since it uses less digits than its factorization.

78302442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33422.

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 78302442 is about 8848.8667070987. The cubic root of 78302442 is about 427.8173916027.

The spelling of 78302442 in words is "seventy-eight million, three hundred two thousand, four hundred forty-two".