78354450 has 36 divisors (see below), whose sum is σ = 210513498. Its totient is φ = 20894400.

The previous prime is 78354449. The next prime is 78354467. The reversal of 78354450 is 5445387.

It can be written as a sum of positive squares in 3 ways, for example, as 47983329 + 30371121 = 6927^2 + 5511^2 .

It is a super-2 number, since 2×78354450² = 12278839669605000, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 86611 + ... + 87510.

Almost surely, 2^78354450 is an apocalyptic number.

78354450 is an abundant number, since it is smaller than the sum of its proper divisors (132159048).

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

78354450 is a wasteful number, since it uses less digits than its factorization.

78354450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174139 (or 174131 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 78354450 is about 8851.8049006968. The cubic root of 78354450 is about 427.9120885328.

The spelling of 78354450 in words is "seventy-eight million, three hundred fifty-four thousand, four hundred fifty".