78346040 has 16 divisors (see below), whose sum is σ = 176278680. Its totient is φ = 31338400.

The previous prime is 78346019. The next prime is 78346067. The reversal of 78346040 is 4064387.

It is a happy number.

It is a super-2 number, since 2×78346040² = 12276203967363200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78345988 and 78346006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 979286 + ... + 979365.

Almost surely, 2^78346040 is an apocalyptic number.

It is an amenable number.

78346040 is an abundant number, since it is smaller than the sum of its proper divisors (97932640).

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

78346040 is a wasteful number, since it uses less digits than its factorization.

78346040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958662 (or 1958658 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 78346040 is about 8851.3298435885. The cubic root of 78346040 is about 427.8967783221.

The spelling of 78346040 in words is "seventy-eight million, three hundred forty-six thousand, forty".