78270406 has 8 divisors (see below), whose sum is σ = 120136104. Its totient is φ = 38225040.

The previous prime is 78270389. The next prime is 78270407. The reversal of 78270406 is 60407287.

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

It is a super-2 number, since 2×78270406² = 12252512910809672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78270407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 454975 + ... + 455146.

It is an arithmetic number, because the mean of its divisors is an integer number (15017013).

Almost surely, 2^78270406 is an apocalyptic number.

78270406 is a deficient number, since it is larger than the sum of its proper divisors (41865698).

78270406 is a wasteful number, since it uses less digits than its factorization.

78270406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910166.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 78270406 is about 8847.0563466048. The cubic root of 78270406 is about 427.7590391122.

The spelling of 78270406 in words is "seventy-eight million, two hundred seventy thousand, four hundred six".