620478746 has 4 divisors (see below), whose sum is σ = 930718122. Its totient is φ = 310239372.

The previous prime is 620478743. The next prime is 620478773. The reversal of 620478746 is 647874026.

620478746 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 647874026 = 2 ⋅323937013.

It can be written as a sum of positive squares in only one way, i.e., 495285025 + 125193721 = 22255^2 + 11189^2 .

It is a super-3 number, since 3×620478746³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 620478697 and 620478706.

It is not an unprimeable number, because it can be changed into a prime (620478743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155119685 + ... + 155119688.

Almost surely, 2^620478746 is an apocalyptic number.

620478746 is a deficient number, since it is larger than the sum of its proper divisors (310239376).

620478746 is a wasteful number, since it uses less digits than its factorization.

620478746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310239375.

The product of its (nonzero) digits is 451584, while the sum is 44.

The square root of 620478746 is about 24909.4107919075. The cubic root of 620478746 is about 852.9213190777.

The spelling of 620478746 in words is "six hundred twenty million, four hundred seventy-eight thousand, seven hundred forty-six".