628799040 has 168 divisors, whose sum is σ = 2232891648. Its totient is φ = 162247680.

The previous prime is 628799023. The next prime is 628799051. The reversal of 628799040 is 40997826.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85759 + ... + 92801.

Almost surely, 2^628799040 is an apocalyptic number.

628799040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 628799040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1116445824).

628799040 is an abundant number, since it is smaller than the sum of its proper divisors (1604092608).

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

628799040 is a wasteful number, since it uses less digits than its factorization.

628799040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7097 (or 7084 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 628799040 is about 25075.8656879478. The cubic root of 628799040 is about 856.7168130311.

The spelling of 628799040 in words is "six hundred twenty-eight million, seven hundred ninety-nine thousand, forty".